find the average of his two highest test scores

sherya mathur

sherya mathur

@sherya-mathur-cI63wY • Oct 27, 2024
Q:A players average score on 4 tests is 85.5. The average of his 3 highest scores is 87, and his two lowest scores are the same as each other. What is the average of his two highest test scores?
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  • CIVILPRINCESS

    CIVILPRINCESS

    @civilprincess-308hDv • May 2, 2010

    let w,x,y,z be the four scores.
    (W+X+y+z)/4=85.5
    W+X+y+z= 4x85.5
    Y=z
    =>w+x+2y=4x85.5
    W+x+y= 3x87
    Y=3x87-x-w
    W+x+2(3x87-x-w)=4 x 85.5
    -w-x=4x85.5-2x3x87
    W+x=-342+522=180
    There fore (w+x)/2=90(ans)

    is it right:?:
  • Saandeep Sreerambatla

    Saandeep Sreerambatla

    @saandeep-sreerambatla-hWHU1M • May 3, 2010

    Yep it is CP 😀